1252135135 has 4 divisors (see below), whose sum is σ = 1502562168. Its totient is φ = 1001708104.

The previous prime is 1252135127. The next prime is 1252135151. The reversal of 1252135135 is 5315312521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5315312521 = 28277 ⋅187973.

It is a cyclic number.

It is not a de Polignac number, because 1252135135 - 2³ = 1252135127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125213509 + ... + 125213518.

It is an arithmetic number, because the mean of its divisors is an integer number (375640542).

Almost surely, 2^1252135135 is an apocalyptic number.

1252135135 is a deficient number, since it is larger than the sum of its proper divisors (250427033).

1252135135 is an equidigital number, since it uses as much as digits as its factorization.

1252135135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250427032.

The product of its digits is 4500, while the sum is 28.

The square root of 1252135135 is about 35385.5215448353. The cubic root of 1252135135 is about 1077.8303306547.

Adding to 1252135135 its reverse (5315312521), we get a palindrome (6567447656).

The spelling of 1252135135 in words is "one billion, two hundred fifty-two million, one hundred thirty-five thousand, one hundred thirty-five".